BGE - move (absolute) camera to static target
With your camera create an animation action with location keys.

Example: 


frame 1 - Position A
frame 2 - Position B
frame 3 - Position C


Option A)

When you want to set position A you play the action from frame 1 to frame 1.
When you want to set position B you play the action from frame 2 to frame 2.
When you want to set position C you play the action from frame 3 to frame 3.

You need one action actuator for each position.


Option B)

When you want to set position A, assign a property "frame" the value 1 and activate an action actuator in property mode playing the frame of property "frame".